Ender, has the whirring sound in your car been rectified?
If the whirring sound is gone when aircon is switched off, then it's due to the aircon compressor. If the whirring sound is still there, then it's something else like worn out bearings, etc.
Recently I got a loud whirring sound whenever I started the engine and there was also whirring sound when I stepped on the gas. Sent my car to the mechanic yesterday. It was found that bearings had worn out/damaged that caused the whirring sound.
My mechanic also told me there was a Cefiro which had the same problem when the car was in Ipoh. The owner decided to drive straight back to SG (with aircon off). When he reached JB, the bearings jammed and the multilink belt snapped. He was considered lucky to have reached JB and towing the car back to SG was still manageable.
So Ender, you use to drive to Genting and other places in MY, better check.
I got the bearings and multilink belt changed yesterday and now the car is very quiet like before.
Big bearing $20
Small bearing $18
Multilink belt $40
Labour $45
Total damage $123, not too expensive and my mind is at peace because I also chiong MY quite often.